172271243 has 2 divisors, whose sum is σ = 172271244. Its totient is φ = 172271242.

The previous prime is 172271213. The next prime is 172271249. The reversal of 172271243 is 342172271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172271243 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172271249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86135621 + 86135622.

It is an arithmetic number, because the mean of its divisors is an integer number (86135622).

Almost surely, 2^172271243 is an apocalyptic number.

172271243 is a deficient number, since it is larger than the sum of its proper divisors (1).

172271243 is an equidigital number, since it uses as much as digits as its factorization.

172271243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 29.

The square root of 172271243 is about 13125.2140173027. The cubic root of 172271243 is about 556.4219609231.

The spelling of 172271243 in words is "one hundred seventy-two million, two hundred seventy-one thousand, two hundred forty-three".